/Engine/Source/Runtime/GeometryCore/Public/Spatial/SparseDynamicOctree3.h
void Insert_NewChildCell ( int32 ObjectID, const [FAxisAlignedBox3d](API\Runtime\GeometryCore\FAxisAlignedBox3d) & Bounds, int ParentCellID, [FSparseOctreeCell](API\Runtime\GeometryCore\Spatial\FSparseOctreeCell) NewChildCell, int ChildIdx )